Mississippi Administrative Code
Title 11 - Mississippi Department of Environmental Quality
Part 5 - Underground Storage Tank Regulations
Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018)
Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS
Section 11-5-2-280.1-7 - DOCUMENTATION OF EVALUATION
Section 11-5-2-280.1-7.2 - Corrosion Expert's Evaluation
Current through September 24, 2024
Because the MDEQ has allowed those individuals who may only have minimal training in the principles of cathodic protection to conduct testing of such systems, it must be recognized that there will be instances where the expertise of someone who is more qualified and better understands the principles involved will be necessary.
Some of the more obvious scenarios where a person with a level of expertise equivalent to a "corrosion expert" {as defined in Section 2.1 (280.12) of this document} are necessary are given below. If any of the conditions given below are met, a corrosion expert must evaluate the survey results obtained by a tester and/or conduct further testing and complete Section VII of the MDEQ cathodic protection system evaluation form(s). If the structure-to-soil potential survey is conducted by a person who is qualified as a corrosion expert, completion of Section VII of the MDEQ form(s) is all that is necessary.
A corrosion expert is required to evaluate and/or conduct the survey when:
1. Supplemental anodes are added to a galvanic cathodic protection system and an accepted industry standard is not followed and/or properly documented.
2. Supplemental anodes or other changes in the construction of an impressed current system are made.
3. It is known or suspected that stray current may be affecting the protected structure.
4. The repair and/or addition of supplemental anodes to bare steel/galvanized piping that is galvanically protected (see Section 5.1.3).
5. An inconclusive was declared when testing a galvanically protected structure because both the local and the remote potentials did not indicate the same result (one indicated pass but the other indicated fail).
Although not specifically listed above, it should be recognized that there might be additional circumstances that may arise that will require evaluation, and/or design by a corrosion expert.
